[acqq]

How about displaying the comments "shallower": if some discussion ("a branch in the comments") goes too deep, maybe that's what doesn't have to be on the same page, as it's obviously something where a lot of arguments and counterarguments occur, and not something where the biggest insight is to be expected.

Such comment handling would however certainly motivate people to "post without the parent."

[danvet]

I'd very much welcome that. My gut feeling is that on quite a few posts, discussion seems to stick to the first comment. I'm assuming that starts to happen as soon as this top-level comment has enough upvotes to quickly displace any new postings.

I think preventing such "sticky" threads from clobbering the first pages of comments may add some decent value to the discussion. Especially in brining in different aspects and povs, perhaps sometimes yielding a more balanced discussion.